<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>混合布局编程挑战</title>
<style type="text/css">
body{ margin:0; padding:0; font-size:30px; color:#fff}
.top{width:100%;height:200px;background:gray;}
.main{width:100%;height:600px;}
.left{width:30%;height:600px;background:blue;float:left;}
.right{width:70%;height:600px;background:green;position:absolute;margin:0 0 0 30%;border-left:solid red 10px;}
.foot{width:100%;height:100px;background:orange;}
</style>

</head>

<body>
<div class="top">top</div>
<div class="main">
<div class="left">left</div>
    <div class="right">right</div>
    
</div>
<div class="foot">foot</div>

</body>
</html>